The regular sequence or concatenation of social phenomena must be studied to find out what can be done, and what should be done.
为了找出能够做点什么、应该做点什么，必须对社会现象的常规序列或连锁反应进行研究。
Concatenation refers to the operation of appending one sequence to another.
串联是指将一个序列追加到另一个序列的运算。
Concatenation refers to the operation of appending one sequence to another.
串联是指将一个序列追加到另一个序列的运算。
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